Step stool



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front view;

FIG. 3 is a rear view;

FIG. 4 is a right side view, the left side view being a mirror imagethereof;

FIG. 5 is a top view;

FIG. 6 is a right side view showing a second embodiment of my design,the left side view being a mirror image thereof;

FIG. 7 is a perspective rear view showing a third embodiment of mydesign the front and sides being identical to the step stool shown inFIG. 1; and,

FIG. 8 is a front perspective view showing a fourth embodiment of mydesign the rear being identical to the step stool in FIG. 1.

In further respect of the fourth embodiment of my design shown in FIG.8, it should be noted and understood that the stippled shading shown inrespect of the side elements thereof is intended to represent only acontrasting coloration of the so shaded side elements with respect toother elements of the article and is not intended to represent anyparticular coloration, hue or intensity.

The ornamental design for a step stool, as shown and described.